Update DiagnosticsSema.def

Co-authored-by: Holly Borla <hborla@apple.com>

Author: ktoso

include/swift/AST/DiagnosticsSema.def

@@ -5657,7 +5657,7 @@ ERROR(distributed_actor_func_variadic, none,
       "cannot declare variadic argument %0 in %kind1",
       (DeclName, const ValueDecl *))
 ERROR(distributed_actor_func_typed_throws, none,
-      "cannot declare distributed function function with typed throws",
+      "cannot declare distributed function with typed throws",
       ())
 NOTE(actor_mutable_state,none,
      "mutation of this %0 is only permitted within the actor",